The K3â"¢ coating is the first coating that players report, “sounds as good or better than uncoated strings.†DRâ€TMs new, remarkable, proprietary and patent pending K3â"¢ Technology Coating is the first coating that makes no apologizes and no excuses for not delivering sound equal to uncoated strings. Players tell us that these strings have more volume, less unwanted overtones, greater clarity and articulation then standard, uncoated strings. Yet, they provide the same protection due to corrosion and perspiration as well as increased tone life that coated strings are known for. These strings are Red Coated Electric Guitar Strings wound on a hexagonal core.Available Gauges;RDE-9 - Lite 09, 11, 16, 24, 32, 42. RDE-10 - Medium 10, 13, 17, 26, 36, 46. RDE-11 - Heavy 11, 14, 18, 28, 38, 50.RDE-12 - Extra Heavy 12, 15, 24, 32, 42, 52.